using System.Text;
using System.Threading.Tasks;

namespace UnifiedTests;

[TestClass]
#if XUNIT3
public class SetupTeardownTests : IDisposable
#else
public class SetupTeardownTests
#endif
{
    // Simulated expensive state
    private byte[] _databaseConnection;
    private List<string> _tempFiles;
    private HttpClient _httpClient;
    private StringBuilder _logBuilder;

#if TUNIT
    [Before(Test)]
    public async Task Setup()
#elif XUNIT3
    public SetupTeardownTests()
#elif NUNIT
    [SetUp]
    public async Task Setup()
#elif MSTEST
    [TestInitialize]
    public async Task Setup()
#else
    public async Task Setup()
#endif
    {
#if XUNIT3
        SetupCore().GetAwaiter().GetResult();
    }

    private async Task SetupCore()
    {
#endif
        // Simulate expensive database connection initialization
        _databaseConnection = new byte[1024 * 100]; // 100KB allocation
        for (int i = 0; i < _databaseConnection.Length; i++)
        {
            _databaseConnection[i] = (byte)(i % 256);
        }

        // Simulate file system setup
        _tempFiles = [];
        await Task.Delay(5); // Simulate async I/O

        // Simulate HTTP client initialization
        _httpClient = new HttpClient
        {
            Timeout = TimeSpan.FromSeconds(30)
        };

        // Simulate logging infrastructure
        _logBuilder = new StringBuilder(1000);
        _logBuilder.AppendLine($"Test started at {DateTime.UtcNow}");

        // Simulate loading configuration
        await Task.Delay(5);
    }

#if TUNIT
    [After(Test)]
    public async Task Cleanup()
#elif XUNIT3
    public void Dispose()
#elif NUNIT
    [TearDown]
    public async Task Cleanup()
#elif MSTEST
    [TestCleanup]
    public async Task Cleanup()
#else
    public async Task Cleanup()
#endif
    {
#if XUNIT3
        CleanupCore().GetAwaiter().GetResult();
    }

    private async Task CleanupCore()
    {
#endif
        // Simulate database connection cleanup
        if (_databaseConnection != null)
        {
            Array.Clear(_databaseConnection, 0, _databaseConnection.Length);
            _databaseConnection = null!;
        }

        // Simulate file cleanup
        if (_tempFiles != null)
        {
            await Task.Delay(5); // Simulate async I/O
            _tempFiles.Clear();
            _tempFiles = null!;
        }

        // Cleanup HTTP client
        _httpClient?.Dispose();
        _httpClient = null!;

        // Finalize logging
        if (_logBuilder != null)
        {
            _logBuilder.AppendLine($"Test completed at {DateTime.UtcNow}");
            _logBuilder.Clear();
            _logBuilder = null!;
        }

        await Task.Delay(5); // Simulate async cleanup
    }

    [Test]
    public void DatabaseOperationTest()
    {
        // Simulate database query
        var sum = 0;
        for (int i = 0; i < 1000; i++)
        {
            sum += _databaseConnection[i];
        }
        _logBuilder.AppendLine($"Database operation result: {sum}");
    }

    [Test]
    public async Task AsyncDatabaseOperationTest()
    {
        // Simulate async database operation
        await Task.Delay(10);
        var sum = 0;
        for (int i = 0; i < 1000; i++)
        {
            sum += _databaseConnection[i];
        }
        _logBuilder.AppendLine($"Async database operation result: {sum}");
    }

    [Test]
    public void FileSystemOperationTest()
    {
        // Simulate file operations
        for (int i = 0; i < 10; i++)
        {
            _tempFiles.Add($"temp_file_{i}.txt");
        }
        _logBuilder.AppendLine($"Created {_tempFiles.Count} temp files");
    }

    [Test]
    public async Task AsyncFileSystemOperationTest()
    {
        // Simulate async file operations
        await Task.Delay(10);
        for (int i = 0; i < 10; i++)
        {
            _tempFiles.Add($"async_temp_file_{i}.txt");
        }
        _logBuilder.AppendLine($"Created {_tempFiles.Count} temp files asynchronously");
    }

    [Test]
    public void HttpClientOperationTest()
    {
        // Simulate HTTP client usage
        var timeout = _httpClient.Timeout;
        _logBuilder.AppendLine($"HTTP client timeout: {timeout.TotalSeconds}s");
    }

    [Test]
    public async Task AsyncHttpClientOperationTest()
    {
        // Simulate async HTTP operation
        await Task.Delay(10);
        var timeout = _httpClient.Timeout;
        _logBuilder.AppendLine($"Async HTTP client timeout: {timeout.TotalSeconds}s");
    }

    [Test]
    public void LoggingOperationTest()
    {
        // Simulate logging
        for (int i = 0; i < 50; i++)
        {
            _logBuilder.AppendLine($"Log entry {i}");
        }
    }

    [Test]
    public async Task AsyncLoggingOperationTest()
    {
        // Simulate async logging
        await Task.Delay(10);
        for (int i = 0; i < 50; i++)
        {
            _logBuilder.AppendLine($"Async log entry {i}");
        }
    }

    [Test]
    public void MemoryIntensiveOperationTest()
    {
        // Simulate memory-intensive operation
        var tempBuffer = new byte[1024 * 50]; // 50KB
        for (int i = 0; i < tempBuffer.Length; i++)
        {
            tempBuffer[i] = _databaseConnection[i % _databaseConnection.Length];
        }
        var sum = tempBuffer.Sum(b => (int)b);
        _logBuilder.AppendLine($"Memory operation result: {sum}");
    }

    [Test]
    public async Task AsyncMemoryIntensiveOperationTest()
    {
        // Simulate async memory-intensive operation
        await Task.Delay(10);
        var tempBuffer = new byte[1024 * 50]; // 50KB
        for (int i = 0; i < tempBuffer.Length; i++)
        {
            tempBuffer[i] = _databaseConnection[i % _databaseConnection.Length];
        }
        var sum = tempBuffer.Sum(b => (int)b);
        _logBuilder.AppendLine($"Async memory operation result: {sum}");
    }

    [Test]
    public void ComputationTest()
    {
        // Simulate computation
        var result = 0;
        for (int i = 0; i < 10000; i++)
        {
            result += i * i;
        }
        _logBuilder.AppendLine($"Computation result: {result}");
    }

    [Test]
    public async Task AsyncComputationTest()
    {
        // Simulate async computation
        await Task.Delay(10);
        var result = 0;
        for (int i = 0; i < 10000; i++)
        {
            result += i * i;
        }
        _logBuilder.AppendLine($"Async computation result: {result}");
    }

    [Test]
    public void StringManipulationTest()
    {
        // Simulate string operations
        var sb = new StringBuilder();
        for (int i = 0; i < 100; i++)
        {
            sb.Append($"Item {i}, ");
        }
        _logBuilder.AppendLine($"String length: {sb.Length}");
    }

    [Test]
    public async Task AsyncStringManipulationTest()
    {
        // Simulate async string operations
        await Task.Delay(10);
        var sb = new StringBuilder();
        for (int i = 0; i < 100; i++)
        {
            sb.Append($"Item {i}, ");
        }
        _logBuilder.AppendLine($"Async string length: {sb.Length}");
    }

    [Test]
    public void CollectionOperationTest()
    {
        // Simulate collection operations
        var numbers = Enumerable.Range(0, 1000).ToList();
        var filtered = numbers.Where(n => n % 2 == 0).ToList();
        _logBuilder.AppendLine($"Filtered count: {filtered.Count}");
    }

    [Test]
    public async Task AsyncCollectionOperationTest()
    {
        // Simulate async collection operations
        await Task.Delay(10);
        var numbers = Enumerable.Range(0, 1000).ToList();
        var filtered = numbers.Where(n => n % 2 == 0).ToList();
        _logBuilder.AppendLine($"Async filtered count: {filtered.Count}");
    }

    [Test]
    public void DateTimeOperationTest()
    {
        // Simulate datetime operations
        var start = DateTime.UtcNow;
        var timestamps = new List<DateTime>();
        for (int i = 0; i < 100; i++)
        {
            timestamps.Add(start.AddSeconds(i));
        }
        _logBuilder.AppendLine($"Timestamps created: {timestamps.Count}");
    }

    [Test]
    public async Task AsyncDateTimeOperationTest()
    {
        // Simulate async datetime operations
        await Task.Delay(10);
        var start = DateTime.UtcNow;
        var timestamps = new List<DateTime>();
        for (int i = 0; i < 100; i++)
        {
            timestamps.Add(start.AddSeconds(i));
        }
        _logBuilder.AppendLine($"Async timestamps created: {timestamps.Count}");
    }

    [Test]
    public void DictionaryOperationTest()
    {
        // Simulate dictionary operations
        var dict = new Dictionary<string, int>();
        for (int i = 0; i < 100; i++)
        {
            dict[$"key_{i}"] = i * 2;
        }
        _logBuilder.AppendLine($"Dictionary size: {dict.Count}");
    }

    [Test]
    public async Task AsyncDictionaryOperationTest()
    {
        // Simulate async dictionary operations
        await Task.Delay(10);
        var dict = new Dictionary<string, int>();
        for (int i = 0; i < 100; i++)
        {
            dict[$"key_{i}"] = i * 2;
        }
        _logBuilder.AppendLine($"Async dictionary size: {dict.Count}");
    }

    [Test]
    public void JsonOperationTest()
    {
        // Simulate JSON serialization
        var data = new
        {
            Id = 123,
            Name = "Test Data",
            Values = Enumerable.Range(0, 50).ToArray()
        };
        var json = System.Text.Json.JsonSerializer.Serialize(data);
        _logBuilder.AppendLine($"JSON length: {json.Length}");
    }

    [Test]
    public async Task AsyncJsonOperationTest()
    {
        // Simulate async JSON operations
        await Task.Delay(10);
        var data = new
        {
            Id = 123,
            Name = "Test Data",
            Values = Enumerable.Range(0, 50).ToArray()
        };
        var json = System.Text.Json.JsonSerializer.Serialize(data);
        _logBuilder.AppendLine($"Async JSON length: {json.Length}");
    }
}
